#include <complex.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#include "constants.h"

void BiCGSTAB_precond_CRS(double complex *val, int *col_ind, int *row_ptr, 
			  double complex *b, 
			  double complex *x0, 
			  int n, 
			  double tolx, 
			  double tolerance);
